Phân biệt tế bào động vật với tế bào thực vật

hãy lập ra kế hoạch rèn luyện tim mạch cho bản thân em

Giải giúp mình với hứa vote 5 sao

cây xương rồng có những đạc điểm nào giúp nó thức nghi với môi trường sống khô hạn (nhớ ngắn thôi nhé)

Dùng HĐT, phân tích thành nhân tử hoặc chia thông thường để làm tính chia: $(81x^{4}$$-64y^{2}$$):(8y-9x^{2}$$)$

Tìm x,biết: a) giá trị tuyệt đối của 2x-3 cộng giá trị tuyệt đối của y-5 bằng 0 7 mũ x+2+2.7 mũ x

Phân tích đa thức thành nhân tử: x^2 - 4x - y^2 +4

1. I can ___ promise that this year is going to be very different (confident) 2. He did finally come with us although it took a long time to __ him(persuasive) 3. Without your ___, we couldn't finished the project before the deadline (participant)

The practice of holding royal examinations to select talented people for administrationbegan in 1075. It continued throughout the Le dynasty and up to 1919 when the Nguyen dynasty held the last examination. For more than 300 years, royal examinations had been irregularly, and the number of laureates for each exam was small. In 1434, Emperor Le Thai Tong ordered that examinations should be held regularly, once every three years. From 1442, laureates of a royal examination were awarded the title “Tiensi ” (Doctoral laureate), and one stone tablet was erected for each examination. From 1484 to 1780, 82 stone tablets were erected to record the names of 1304 Tiensi. 1. When did the practice of holding Royal examinations begin? When did it end? ___________________________________________________________ 2. How long did the royal examinations last? ___________________________________________________________ 3. Who ordered that the royal examinations should be held regularly? When did it happen? ___________________________________________________________ 4. Which title were the laureates of a royal examination awarded? ___________________________________________________________ 5. How many stone tablets were erected from 1484 to 1780? ___________________________________________________________

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